A 17-year-old boy from Watford appeared at St Albans Crown Court last month accused of murdering a woman at a house in the town.
The teenager – who cannot be named for legal reasons – is charged with stabbing to death 50-year-old Djolanda Jakubowski.
Police were called at around 5.10pm on Monday, December 16 to a house in Clarke Way, Garston. The victim was pronounced dead at the scene.
The boy was remanded in custody at Feltham Young Offenders Institution by Judge Michael Kay QC.
The judge set a plea hearing for March 6 with a trial date for May 11.